ISSN 2343–7707 ; ISSN-L 1453-7303

Here below we post a list of
Articles already accepted for publication in Issue 4/(December) 2022 of Hidraulica Magazine.
The list displays the article title, author(s) and affiliation, and also the article abstract.
Full-length article will be available online only after publication. 

  • Modification of Cavitation Erosion Resistance of Aluminum Alloy 7075 by Maintaining of Artificial Aging Heat Treatment at 180°C
    Prof.PhD.Eng. Ilare BORDEAȘU1, Dipl. Eng. Alexandru Nicolae LUCA1, PhD.Eng. Iosif LAZĂR1, Dipl. Eng. Dragoș LAZĂR1, Lecturer PhD.Eng. Rodica BĂDĂRĂU1, Prof.PhD.Eng. Brandușa GHIBAN1, Dipl. Eng. Andreea Daniela BUZATU1, Dipl. Eng. Alin Mihai DEMIAN1, Dipl. Eng. Ovidiu Petrișor ODAGIU1, Assoc.Prof.PhD.Eng. Lavinia Mădălina MICU2
    1Politehnica University of Timisoara, Romania
    2Banat University of Agricultural Sciences and Veterinary Medicine of Timisoara, Romania

The use of volume heat treatments aims to change the microstructure and the values of the mechanical properties, with homogeneous distribution in the volume of the part, so as to confer resistance to various stresses. From the point of view of the hydrodynamic stresses of the microjets generated by the cavitation mechanism, these treatments ensure an increase in the life of the required surface. In the case of aluminum-based alloys, volume thermal treatments do not produce important changes in the structural phase, but they cause important changes in the values of the mechanical properties. As these alloys have small specific masses and good mechanical properties, research is currently being resumed aimed at extending their use to parts that work in cavitation such as: propellers of motor boats and pleasure boats, pump rotors in the cooling system of thermal engines and aircraft wings. In this sense, the vibratory cavitation tests are carried out on aluminum alloy 7075 subjected to volumetric thermal treatment of artificial aging at 1800C with a holding time of 24 hours. The comparison with the results previously obtained on the delivered state and the regime with the same temperature and duration of one hour shows that the effect of increasing the duration of the heat treatment leads to a significant increase compared to the state of delivery and slightly different from that obtained by the one with a duration of one hour.

  • Mathematical Modeling, Laboratory Testing and Numerical Simulation of a Servo-Pump as Part of a Closed Circuit Primary Control Hydrostatic Transmission for Multi-Purpose Trucks
    PhD. Stud. Eng. Alexandru-Polifron CHIRIȚĂ1,2, Prof. PhD. Eng. Cristian PAVEL1
    1Technical University of Civil Engineering of Bucharest (UTCB), Faculty of Technological Equipment, Bucharest, Romania
    2National Institute of Research & Development for Optoelectronics / INOE 2000 – Subsidiary Hydraulics and Pneumatics Research Institute / IHP, Bucharest, Romania

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